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Finding the Fourth Proportional to 26.61, 40.05 and 20.22

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Solution

The fourth proportional to 26.61, 40.05 and 20.22 is: 30.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.61 : 40.05 = 20.22 : x
  2. Step 2: Convert to fraction form
    26.61/40.05 = 20.22/x
  3. Step 3: Cross multiply
    26.61x = 40.05 × 20.22
  4. Step 4: Simplify right side
    26.61x = 809.71
  5. Step 5: Solve for x
    x = 809.71/26.61
  6. Step 6: Final answer
    x = 30.43

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.